URL Encode

用VC实现post数据常常会遇到URL编码问题

在此封装一个工具类进行UTF8编码的转换

源码来自php source code

只是简单的封装给C++调用

 

//URL 编解码类
//来自PHP源码
class CRtUrlConv
{
public:
    static char *urlencode(const char *in_str )
    {
        char *out_str;
        int in_str_len, out_str_len;
        in_str_len=strlen(in_str);
        out_str_len=0;
        out_str =  php_url_encode( in_str , in_str_len, &out_str_len);
        return (char *) out_str;
    }
    static int urldecode(char *s)
    {
        return php_url_decode(s);
    }
private:
    static char *php_url_encode(const char *s , int len , int *new_length)
    {
        register unsigned char c;
        unsigned char *to, *start;
        unsigned char const *from, *end;
        from = (unsigned char *)s;
        end = (unsigned char *)s + len;
        start = to = new unsigned char[3*len+1];
        while (from < end) {
            c = *from++;
            if (c == ' ') {
                *to++ = '+';
#ifndef CHARSET_EBCDIC
            } else if ((c < '0' && c != '-' && c != '.') ||
                (c < 'A' && c > '9') ||
                (c > 'Z' && c < 'a' && c != '_') ||
                (c > 'z')) {
                    to[0] = '%';
                    to[1] = HEXCHARS[c >> 4];
                    to[2] = HEXCHARS[c & 15];
                    to += 3;
#else /*CHARSET_EBCDIC*/
            } else if (!isalnum(c) && strchr("_-.", c) == NULL) {
                /* Allow only alphanumeric chars and '_', '-', '.'; escape the rest */
                to[0] = '%';
                to[1] = HEXCHARS[os_toascii[c] >> 4];
                to[2] = HEXCHARS[os_toascii[c] & 15];
                to += 3;
#endif /*CHARSET_EBCDIC*/
            } else {
                *to++ = c;
            }
        }
        *to = 0;
        if (new_length) {
            *new_length = to - start;
        }
        return (char *) start;
    }
    static int php_url_decode(char *str)
    {
        int len;
        char *dest = str;
        char *data = str;
        len=strlen(str);
        while (len--) {
            if (*data == '+') {
                *dest = ' ';
            }
            else if (*data == '%' && len >= 2 && isxdigit((int) *(data + 1))
                && isxdigit((int) *(data + 2))) {
#ifndef CHARSET_EBCDIC
                    *dest = (char) php_htoi(data + 1);
#else
                    *dest = os_toebcdic[(char) php_htoi(data + 1)];
#endif
                    data += 2;
                    len -= 2;
                } else {
                    *dest = *data;
                }
                data++;
                dest++;
        }
        *dest = '/0';
        return dest - str;
    }
    static int php_htoi(char *s)
    {
        int value;
        int c;
        c = ((unsigned char *)s)[0];
        if (isupper(c))
            c = tolower(c);
        value = (c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10) * 16;
        c = ((unsigned char *)s)[1];
        if (isupper(c))
            c = tolower(c);
        value += c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10;
        return (value);
    }
    static const char hexchars[];
    static const char HEXCHARS[];
};
const char CRtUrlConv::hexchars[] = "0123456789abcdef";
const char CRtUrlConv::HEXCHARS[] = "0123456789ABCDEF";
}